Abstract
AbstractA novel bispyrazole based porous MOF ({[Zn(MBPz)(Ene)0.5]⋅2DMF⋅2H2O}n (1)) with open alkene (‐HC=CH‐) and nitrogen sites has been synthesized, as an efficient fluorescent sensor for Pd(II) ions. The MOF exhibits 3D supramolecular structure with open channels having 27.2% porosity. The unsaturated ‐CH=CH‐ moieties are present along the walls of open channels which is favorable for interaction with guest moieties. The cation sensitivity of 1 was evaluated using a series of transition metal ions in DMF. The fluorescence quenching of 1 was demonstrated by an approximately 94% reduction in the emission intensity upon binding to Pd2+ ions. The emission intensity of 1 at 414 nm has shown a linear response to Pd(II) ion concentration with a detection limit of 4.7 x 10−7 M. The sensing property of 1 towards Pd(II) ions is attributed to the π electron donation from the alkene bonds present in the ligand (Ene).
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